Resources

Glossary

Removable or hinged plate in platform surface which allows access to power unit and hydraulics when lift is in the down position.

Accordion Skirt

A flexible protective skirt that extends approximately 3" out from a minimum-sized lift platform to conceal the base and internal components of the lift and is often used to prevent inadvertent contact with the scissor mechanism by the operator and/or to keep debris out from under the lift. It is typically made from 23-ounce vinyl reinforced with polyester. However, it is not an acceptable form of toe protection according to ANSI MH29.1.

Actuator

Actuator is a device for converting hydraulic, electric, or pneumatic energy into mechanical energy.

Air Bag Actuation

Inflatable air bag provides travel. Use when electric power is not available and/or desirable or hydraulic is not acceptable.

Air/Hydraulic

A system where the primary power is air, which runs the pumps, which sends hydraulic fluid to the cylinders. An air powered hydraulic actuator system.

Ampere

The ampere is the unit of measure for the rate of flow of electric current.

Anchors

Hardware used for Fastening Equipment to Floor or Walls.

Anti-Skid Surface

Diamond tread or abrasive material applied to lift platform.

Approach Ramp

Hinged or fixed plate with structural support from floor level to top of lift platform for loading and unloading.

Audible Signal

Alarm or signal used to alert personnel of equipment starting or moving.

Optical or mechanical sensing to position platform at preset height(s).

Automatic Landing Gate

A landing gate that automatically opens or closes, respectively, as a lift platform arrives at or departs from subject landing.

Auxiliary Contact

Electrical contact used as another switching device on Contactor.

BOM

Bill of Materials for a job or part. The list of all components used for a specific assembly.

Back Frame

The vertical portions of the carriage on cantilever Freightlift.

Back Stop

A back stop panel is installed opposite the loading edge of a VRC platform to prevent a load from falling to the lower level.

Baffle

A device, usually a plate, installed in a reservoir to separate the pump inlet from return lines.

Ball Screw

Rotary to linear motion conversion device, usually electric.

Ball Transfer Surface

Ball type conveyors built into platform, either fixed or retractable.

Base Frame Build Up

Increases lowered height and provides under-clearance.

Bearing

A load support that provides for relative motion between the load and the support.

Bearing Load

The load supporting machine element.

Beveled Toe Guards

According to ANSI MH29-1, "A toe guard plate not less than 8 inches (20.3 cm) in width shall be provided on all unprotected sides as a physical alert. It shall be made of steel, not less than No. 11 gauge (3 mm) in thickness, or other material of equal rigidity, attached flush with the vertical edge of the platform, and slanted inwardly at an angle of approximately 30 degrees from vertical."

Bleed-Off

To divert a specific controllable portion of pump flow directly back to reservoir.

Break Over (Bridge / Ramp)

A device hinged to a lift platform which can be raised or broken over when the platform is being raised or lowered.

Breather

A device, which permits air to move in and out of a reservoir or component to maintain atmospheric pressure. (Prevents a vacuum)

Bushing

A lining for reducing friction on moving parts.

Bushing, Composite

A proprietary filled PTFE liner which is securely bonded to the epoxy-glass filament, wound composite backing.

By-Pass

A secondary passage for fluid flow.

Cable

Wire rope.

Cable Reeving

The routing of the wire rope on a Freightlift.

Cam Follower

A wheel or roller used to carry the capacity of a lift or turntable on a surface.

Cantilever

A style of Vertical Reciprocating Conveyor where the carriage rides along two masts that are mounted on the same side of the carriage. This style lift will accommodate all three loading patterns.

Capacity, Lifting

The rated capacity of a scissor lift applied as a uniformly distributed load while the platform is raising or lowering.

Capacity, Rated

The maximum load which can be applied to the platform according to the manufacturer's specification.

Capacity, Rollover

The maximum amount of single axle load which can be rolled over the platform surface when the lift is in its fully closed position.

Carriage

The entire assembly that travels in the mast and carries the load.

Cartridge

1) The replaceable element of a fluid filter. 2) The pumping unit from a vane pump, composed of the rotor, ring, vanes and one or both side plates.

Casters

Fixed or swivel, can be positioned in a variety of configurations for portability and transportability.

Center of Gravity

Location through which the entire mass of an object can be resolved.

Check Valve

A valve, which permits flow of fluid in one direction only.

Circuit

An arrangement of components interconnected to perform a specific controlling function within a system.

Clevis

A structural-mounting device used in scissor lifts (used in attaching platform to legs and legs to base.

Compressibility

The change in volume of a unit volume of a fluid when it is subjected to a unit change in pressure.

Contactor

Electrical device that is specifically sized for a Motor.

Continuous Duty

The motor is rated to run continuous, although it may also be used intermittently.

Continuous Running Motor

A motor which remains running even when the lift is not in use.

Control Transformer

An electrical component which alters (reduces) the primary voltage.

Control Voltage

The secondary voltage, which comes from the transformer to the push-button.

Controller

The assembly of electrical components which transforms primary voltage to secondary voltage and controls the functions of the motor and the control valves.

Controls

Any electrical device used in the operation of a Lift normally includes push button stations, control box, limit switches, interlocks, etc.

Controls - Constant Pressure

A pushbutton control of travel which when finger is removed from button, travel stops.

Controls – Press and Hold

These operator controls shall: •Be of the type when pressed will make the scissor lift operate. •Be of the type when released the scissor lift will stop. •Return to the off position when released. •Be clearly marked as to direction and function. •Be protected from inadvertent operation. •Be readily accessible to the operator.

Controls – Press and Release

Push button control which can be pushed to activate and released, travel ceases automatically at preset level. These operator controls shall: •Be of the type that when pressed will make the scissor lift operate. •Be of the type that will continue to operate the scissor lift until stopped by another control device. •Return to a neutral position when released. •Include an emergency stop device that deactivates all powered functions that affect scissor lift movement. •Be protected from inadvertent operation. •Be readily accessible to the operator. •Not to be used on industrial scissor lifts that allow operators and/or riders.

Conveyor, Vertical Reciprocating

Vertical Reciprocating Conveyors, VRC, Material Lifts, or Freight Lift provide the most economical, dependable, and safe method of high capacity freight movement between multiple levels with the smallest platform size or footprint possible. An economical alternative to expensive freight elevators or fork trucks, Autoquip VRC Material Lifts can be customized to improve freight and goods transfer and storage in any application: industrial mezzanines, retail stores, restaurants, warehouses, conveyor systems, and much more. Hydraulic designs are limited to travels of 28 feet of travel, where mechanical VRC lifts can travel up to 100 feet. Each Autoquip Freight lift is designed and manufactured to meet or exceed the requirements of ASME B20.1 - Safety Requirements for Conveyors and Related Equipment.

Counterbalance Valve

A pressure control valve which maintains back pressure to prevent a load from falling.

Critical Components

Those components whose absence or failure would cause the equipment of which they are a part of to become inadequate or unsafe for its specific purpose.

Cycle

A cycle is a period of time between motor starts.

Cylinder

A device, which converts fluid power into linear force and motion. It usually consists of a movable element such as a piston and piston rod, plunger or ram, operating within a cylindrical bore.

Cylinder, Direct Acting

The cylinder or ram transmits lifting force directly to the carriage rather than through the use of cables, sheaves or chains.

Cylinder, Double Acting

A cylinder in which fluid force can be applied to the movable element in either direction, typically used when application requires control of both up and down action.

Cylinder, Ram

A cylinder in which the movable element has the same cross sectional area as the piston rod (single acting).

Cylinder, Single Acting

A cylinder in which the fluid force can be applied to the movable element in only one direction.

Cylinder, Single Rod

A cylinder with a piston rod extending from only one end.

DU Bushing

A pre-finished, high performance, bearing used in the pivot points of a scissor lift. (Lead Impregnated Teflon with steel backing)

Deltatrol Valve

A control valve which is proprietary to Autoquip, contains check valve, down valve, Flow control, pressure relief, oil filtration, and pressure regulator.

Direct Acting Cylinder

The cylinder or ram transmits lifting force directly to the carriage rather than through the use of cables, sheaves or chains.

Directional Valve

A valve, which selectively directs or prevents fluid flow to desired channels.

Displacement

The quantity of fluid which can pass through a pump, motor or cylinder in a single revolution or stroke.

Dock Lift

A stationary or portable scissor lift used in the area of a dock to transfer loads (typically wheeled loads) from a fixed elevation to a vehicle; the lift is operated from the platform which may include rider(s) in addition to the operator. Most dock lifts are permanently installed in concrete pits, but some scissor-style lifts are portable for use in multiple locations such as truck delivery areas that have no elevated dock or where recessed pits are not feasible. Autoquip dock lifts share common features for rugged, outdoor use and required safety measures: anti-skid deck plate, beveled toe-guard protection, and extra structural steel support to withstand impact loading, concentrated wheel loading, off-centered loading, and high rollover loads when lowered in to a recessed pit.

Down Solenoid

An electrical mechanical device that, when electrically energized, opens the down valve.

Drift

The distance a lift platform will slowly drop due, usually to slight leaks of the hydraulic fluid or inability of a brake to hold a motor.

Drop Bar

A bar that prevents loads from rolling off the platform.

Dual Tap Transformer

Provides (2) different secondary voltages from the same device.

Ductile Material

Materials having a minimum elongation of 5% in 2 inches (50.8mm).

Dump Valve

A valve used to divert hydraulic flow directly to tank.

Dust Tight

Is design to prevent any dust from entering the device.

Duty Cycle

The rating of an electrical motor or component.

Electric Toe Guard

A device mounted below the platform such that when an obstruction is met during descent, the lift will be brought to rest before entrapment can occur, whether the lift is loaded or empty.

Electric/Hydraulic

A system which primary power is electric, which runs (pumps) hydraulic fluid to the cylinders.

Enclosure

Structure surrounding a lift to prevent anything from interfering with normal operation and to safe guard personnel. Typically 8' high panels made of expanded metal that will prevent a 2" diameter ball from passing through. This is a requirement of the conveyor code. (ANSI-B20.1)

Electrical Devices that are designed for a specific location or area where certain Hazardous condition may or can exist.

F.O.B.

Point where freight begins and where shipping charges begin.

Filter

A device through which fluid is passed to separate matter held in suspension. A device whose primary function is the retention by a porous media of insoluble contaminants from a fluid.

Flanged Wheels

For use with flat or rail type track to provide fixed path lateral movement.

Flow Control Valve

A valve, which controls the rate of oil flow.

Flow Rate

The volume of a fluid passing through the circuit per unit of time, usually gallons per minute.

Flush Mount Push-Button

Push- Button that mounts in the wall, which allows only the cover plate and push-button to be visible.

Fork Pockets

Allow unit to be readily moved by fork truck.

GPM

Gallons per Minute.

Gate

A device that opens and closes to allow access to the carriage for loading and unloading. Normally a swing, sliding, or vertical acting device constructed of similar expanded metal as the enclosure.

Gib

Device used to contain roller pin or roller.

Guarded by Location

Describes moving parts so protected by their remoteness from the floor, platform, walkway, or other working level, or by their location with reference to frame, foundation, or structure as to reduce the foreseeable risk of accidental contact by persons or objects. Remoteness from foreseeable, regular, or frequent presence of public or employed personnel may in reasonable circumstances constitute guarding by location.

Guide Angle to Guide Angle

Dimension given to set the mast on a Freight Lift.

Handrails and Snap Chain

For use when personnel must be raised or lowered. Removable rails allow access from all sides when lift is not in use. Rails are 48" high.

Hazardous Duty

Usually a location which requires special electrical components.

High Cycle

A requirement for continuous cycling of the lift and power unit, typically considered more than 60,000 cycles per year.

High Speed

Faster than standard engineered speeds.

Hinged Bridge

A hinged transition plate which is attached to the edge of the platform and used to bridge the gap between the platform and landing and/or truck bed.

Horizontal Sliding Gate

A gate that operates horizontal to the floor.

Horsepower (HP)

The power required to lift 550 pounds one foot in one second or 33,000 pounds one foot a minute. A horsepower is equal to 745.7 watts or to 42.4 British Thermal Units per minute.

Hydraulic

Operation by movement and force of liquid.

Hydraulic Piping System

The entire system of fluid conductors such as hose, pipe, tubing, etc., utilized to transfer hydraulic fluid between various operating components of a hydraulic system such as pumps, valves, actuators, etc.

Interlock

An electrical mechanical system for doors or gates to prevent operation of the lift if all gates are not closed or if the lift platform is not present at that level.

Intermediate Stop

Usually a stop between Top and Bottom floors, or travel of the platform.

Intermittent Duty

Motor is rated to run only part time. (2 min. run time and 2 min. rest time.)

Kilowatt

Power is the rate of doing work.

Landing

A permanent working surface at a fixed elevation used for loading/unloading a scissor lift platform. (G) positioned at that elevation.

Landing Gate

A mechanical barrier to control personnel traffic at a landing.

Landing Interlock

A device to prevent lift movement when a landing gate is not fully closed and to prevent the landing gate from being opened unless the lift platform is present at that landing.

Lift Table

A stationary, portable or transport scissor lift used to raise, lower, stack, convey and/or transfer material from one elevation to another. No riders are allowed on the platform. Scissor lifts provide the most stable, dependable, and versatile method of lifting heavy loads. Because of their simplicity & few moving parts, maintenance-free bushings, and wide acceptance by customers - scissor tables provide many years of trouble free operation for relatively small capital investment. Scissor lift mechanisms are easily modified by narrowing, widening, combining or stacking to achieve an extremely wide array of configurations to effectively move loads of virtually any size and/or capacity to heights of 20 feet or more. Hydraulic scissor lifts are the most popular, versatile, and economical of all actuation styles, but completely pneumatic or mechanical scissor tables are also available - depending on the demands of the application. Autoquip scissor lifts are designed and manufactured to meet the industry safety requirements set forth in ANSI MH29.1.

Lifting Capacity

The rated load of a scissor lift applied as a uniformly distributed load.

Limit Switch

An electrical device that stops travel and prevents over travel. It also provides height positioning and activates associated equipment.

Limited Travel

Travel is limited either with electrical device (limit switch) or mechanical device.

Linear Actuator

A device for converting hydraulic energy into linear motion - a cylinder or ram.

Load Height

The maximum height of material a Platform can accommodate.

Load Pattern

A method to describe the direction a load will be moved on and off a platform at different levels. •"Z" Load Pattern - The traffic flow is to load the lift from one side and exit the lift off the opposite side as it was loaded. •"C" Load Pattern - Traffic enters the lift on one side and exits the lift from the same side as the lift was loaded. •"90◦"Load Pattern - Traffic pattern requires a cantilever carriage to enter the lift from one side and exit the lift at a 90◦ angle from the loading position.

A control actuated by the operator, regardless of the means of actuation. Example: Lever or foot pedal control for directional valves.

Manual Override

A means of manually actuating an automatically controlled device.

Manufacturer

A person or entity that makes, builds, or produces an industrial scissor lift.

Mast(s)

The vertical members between which the carriage is guided throughout its vertical travel.

Mechanical Stop

A mechanical means of stopping travel at a predetermined spot or to prevent over travel.

Motor

A device, which converts fluid or electricity into mechanical force and motion. It usually provides rotary mechanical motion.

Motor Starter (Magnetic)

To control the starting of the motor and provide protection against electrical overloads. A device operated by control voltage to actuate or connect two high voltage contact points.

Motor, Fixed Displacement

A motor in which the displacement per cycle cannot be varied.

Motor, Linear

A term sometimes used in reference to a cylinder.

Mounted By Others

The mounting of components will be by someone other than Autoquip Personnel.

NEMA Type 1 Enclosure

Enclosures constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts and to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt).

NEMA Type 12 Enclosure

Enclosures constructed (without knockouts) for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and circulating dust, lint, fibers); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing).

NEMA Type 12K Enclosure

Enclosures constructed (with knockouts) for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and circulating dust, lint, fibers); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing).

NEMA Type 13 Enclosure

Enclosures constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and circulating dust, lint, fibers); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing); and to provide a degree of protection against the spraying, splashing, and seepage of oil and non-corrosive coolants.

NEMA Type 2 Enclosure

Enclosures constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing).

NEMA Type 3 Enclosure

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and windblown dust); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow); and that will be undamaged by the external formation of ice on the enclosure.

NEMA Type 3R Enclosure

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow); and that will be undamaged by the external formation of ice on the enclosure.

NEMA Type 3RX Enclosure

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow); that will be undamaged by the external formation of ice on the enclosure that provides an additional level of protection against corrosion; and that will be undamaged by the external formation of ice on the enclosure.

NEMA Type 3S Enclosure

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and windblown dust); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow); and for which the external mechanism(s) remain operable when ice laden.

NEMA Type 3SX Enclosure

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and windblown dust); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow); that provides an additional level of protection against corrosion; and for which the external mechanism(s) remain operable when ice laden.

NEMA Type 3X Enclosure

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and windblown dust); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow); that provides an additional level of protection against corrosion and that will be undamaged by the external formation of ice on the enclosure.

NEMA Type 4 Enclosure

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and windblown dust); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow, splashing water, and hose directed water); and that will be undamaged by the external formation of ice on the enclosure.

NEMA Type 4X Enclosure

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (windblown dust); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (rain, sleet, snow, splashing water, and hose directed water); that provides an additional level of protection against corrosion; and that will be undamaged by the external formation of ice on the enclosure.

NEMA Type 5 Enclosure

Enclosures constructed for indoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt and settling airborne dust, lint, fibers, and flyings); and to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (dripping and light splashing).

NEMA Type 6 Enclosure

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (hose directed water and the entry of water during occasional temporary submersion at a limited depth); and that will be undamaged by the external formation of ice on the enclosure.

NEMA Type 6P Enclosure

Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against access to hazardous parts; to provide a degree of protection of the equipment inside the enclosure against ingress of solid foreign objects (falling dirt); to provide a degree of protection with respect to harmful effects on the equipment due to the ingress of water (hose directed water and the entry of water during prolonged submersion at a limited depth); that provides an additional level of protection against corrosion and that will be undamaged by the external formation of ice on the enclosure.

Non-Ductile Material

Materials having an elongation of less than 5% in 2 inches (50.8mm).

Non-Operating End

The side(s) of the platform not used for loading/unloading. Handrails with midrail and kickplate are supplied as minimum safety protection.

ODP

Open Drip Proof (usually referred to on Electric motors)

Oil Tight

Is for a fitting or box that will not let oil enter into the system or device.

Operating End

The side(s) of the platform used for loading/unloading. A safety chain is supplied as minimum safety protection.

Operational Signals

Visual or audible alarms warn personnel when lift is in use.

Operator

An authorized person controlling the movement of the industrial scissor lift.

Orifice

A restricted passageway in a fluid power system, usually a small hole drilled for the purpose of limiting the flow. A restriction, the length of which is small in respect to its cross-sectional dimensions.

Owner

A person or entity that has possession of an industrial scissor lift by virtue of title to the equipment.

Pantograph Leg Section

The articulated support mechanism characterized by a single central pivot axis and commonly referred to as the scissor leg assembly.

Piston

A solid piston that fits into a larger cylinder and moves back and forth under fluid pressure. A cylindrically shaped part which fits within a cylinder and transmits or receives motion by means of a connecting rod.

Platform

The horizontal surface of the platform or carriage where the load is placed.

Platform Ends

The edges of the platform that are perpendicular to the scissor legs. The end dimension is considered the platform width.

Platform Sides

The edges of the platform that are parallel to the scissor legs. The side dimension is considered the platform length.

Plunger

A cylindrically shaped part, which has only one diameter and is used to transmit thrust.

Pneumatic

Of or relating to air or another gas.

Pneumatic Piping System

The entire system of pneumatic conductors such as hose, pipe, tubing, etc., utilized to transfer gas between various operating components of the pneumatic system such as pumps, valves, actuators, etc.

Poppet

That part of certain valves which prevents flow when it closes against a seat.

Port

An internal or external terminus of a passage in a component.

Positive Displacement

A characteristic of a pump or motor, which has the inlet positively, sealed from the outlet so that fluid cannot re-circulate in the component.

Power

Work per unit of time, measured in horsepower (hp) or watts.

Power Pack

An integral power supply unit usually containing a pump, reservoir, relief valve and directional control.

Power Unit

An assembly including, but not limited to the motor, pump, reservoir, and the Autotrol valve.

Pre-Wired

Means that all practical devices are wired to the control box either to terminal strip or to the device.

Pressure

Force per unit area, usually expressed in pounds per square inch (psi).

Pressure Line

The line carrying the fluid from the pump outlet to the pressurized port of the actuator.

Pressure Relief Valve

A valve that can be set to a predetermined pressure. If the pressure is exceeded the valve will open to prevent damage to hydraulic system. A pressure operated valve which by-passes pump delivery to the reservoir, limiting system pressure to a predetermined maximum value.

Pressure Switch

A switch that can be set to a predetermined pressure. When this pressure is reached it will open thus turning off the control circuit and stopping the pump motor.

Primary Voltage

The main Power being supplied to the motor and the control box, (usually the high voltage on our products.)

Pump

A device, which causes a liquid to flow against a pressure. It converts mechanical force and motion into hydraulic fluid power.

Pump, Fixed Displacement

A pump in which the displacement per cycle cannot be varied.

Pump, Gear

A pump having two or more intermeshing gears or lobed members enclosed in a housing.

Pump, Vane

A pump having multiple radial vanes within a supporting rotor.

Pump, Variable Displacement

A pump in which the displacement per cycle can be varied.

Push-Button Station

The hand held or wall mounted device used to control the motion of the platform.

Qualified Person

A person, who, by possession of a recognized degree, certificate, professional standing, or skill, and who, by knowledge, training and experience, has demonstrated the ability to deal with problems relating to the subject matter, the work, or the project.

Quick Disconnect

Allows for quick disconnect of controls, air, or other lines. Used with portable or frequently relocated lifts. Not available for power supply line.

Rain Tight

Device designed to prevent rain from entering the device.

Raised Height

The total height, measured from the bottom of the base to the top of the platform when the lift is in a fully raised position.

Ram

A single-acting cylinder with a single diameter plunger rather than a piston and rod.

Rating, End/Side Axle Load

The maximum amount of single axle load (in the case of rolling loads) which can be applied to the loading edge of the platform (end or side) when the lift is in any raised position. This rating considers: 1) that some amount of deflection will occur during load transfer, 2) the moving and impact forces imposed by the load, 3) that this is a temporary condition during load transfer only, and 4) that the scissor lift platform is static and non-moving.

Rating, End/Side Edge Load

The maximum amount of static load that can be applied to the edge of the platform (end or side) when the lift is in any raised position. This rating considers: 1) that some amount of deflection will occur during load transfer, 2) that this is a temporary condition during load transfer only, and 3) that the scissor lift platform is static and non-moving.

Reference Dimension

Dimension given as informative but not used for locating.

Remote Power Unit

Power unit that will be mounted outside of the lift.

Reservoir

A tank that holds fluid (oil) for the hydraulic power unit. A container for storage of liquid in a fluid power system.

Restriction

A reduced cross-sectional area in a line or passage, which produces a pressure drop.

Return Line

A line used to carry exhaust fluid from the actuator back to the reservoir.

Rollover

The amount of load being rolled over a lift platform in its fully collapsed position. For inplant lifts, rollover loads must not exceed the rated capacity of the lift in order to prevent permanent damage. For dock lifts, rollover loads must not exceed twice the rated lifting capacity.

Rollover Capacity (load)

The maximum amount of single axle load, which may be rolled over the platform surface when the lift is in its fully closed position.

Safety Factor

The ratio of the maximum load which the lift can withstand to the load which it was designed to withstand under normal operation.

Scissor Lift

A raising/lowering platform that is supported or stabilized by one or more pantograph leg sections. Scissor lifts provide the most stable, dependable, and versatile method of lifting heavy loads. Because of their simplicity & few moving parts, maintenance-free bushings, and wide acceptance by customers - scissor tables provide many years of trouble free operation for relatively small capital investment. Scissor lift mechanisms are easily modified by narrowing, widening, combining or stacking to achieve an extremely wide array of configurations to effectively move loads of virtually any size and/or capacity to heights of 20 feet or more. Hydraulic scissor lifts are the most popular, versatile, and economical of all actuation styles, but completely pneumatic or mechanical scissor tables are also available - depending on the demands of the application. Autoquip scissor lifts are designed and manufactured to meet the industry safety requirements set forth in ANSI MH29.1.

Scissor Lift, mobile

A work access lift designed for lateral movement where: 1) there may be material on the lift platform, 2) there may be operators or other riders on the lift platform during lateral movement, 3) the lift platform may be in a raised position during lateral movement, and 4) the lateral movement is restricted to a predetermined path via tracks, grooves, or other physical guides.

Scissor Lift, portable

A scissor lift designed for lateral movement from one stationary work station to another where: 1) there is no load on the lift platform during lateral movement, 2) there are no operators or other riders on the lift platform during lateral movement, 3) the lift platform is in the fully lowered position during lateral movement, and 4) the lateral movement is unrestricted.

Scissor Lift, transport

A lift table designed for lateral movement where: 1) there may be a load on the lift platform during lateral movement, 2) there are no operators or other riders on the lift platform, 3) the lift platform may be in a raised position during lateral movement, and 4) the lateral movement may be unrestricted.

Secondary Voltage

Usually the control voltage or the lower voltage in the control box.

Self Contained Power Unit (Internal)

Power unit which is mounted in the lift mechanism.

Sequence

The order of a series of operations or movements.

Service Platform (Work Platform)

Platform Devise that is design to be mounted around the top of a component to allow personnel to work on a part safely. (Used on Freightlift around the top of the Drive base.)

Shall

The word "shall" is to be understood as mandatory.

Sheave

Device, which is designed to guide a wire rope or cable. (Pulley)

Should

The word "should" is to be understood as advisory.

Signal

A command or indication of a desired position or velocity.

Single Acting Cylinder

A cylinder in which hydraulic energy can produce thrust or motion in only one direction. (May be mechanically or gravity returned).

Slack Chain Device

Device used to signal or alert of a slack chain condition.

Slack Chain Limit

Limit switch used to signal or stop the movement of the carriage.

Snap Chain

A length of chain with a clasp on the end to close off the operating end of the carriage.

Spliced Carriage

Carriage that is split or in two pieces and will have to be field assembled. This design facilitates ease of installation and handling.

Spliced Mast

Mast that is not all one piece usually cut at a predetermined length to allow ease of installation or handling.

Stability/Stable

A condition in which the sum of the moments that tend to overturn the industrial scissor lift is less than the sum of the moments tending to resist overturning.

Straddle

A style of VRC where the carriage rides suspended between two masts that are located on opposite sides of the same carriage. This style of lift will accommodate "C" and "Z" type loading patterns.

Strainer

A device through which a fluid is passed to separate solids in suspensions. A strainer is usually installed on the intake side of a pump.

Strength Factor

The ration of ultimate strength of the material to the design stress at rated lifting capacity.

Stroke

The length of travel of a piston or plunger.

Structural Strength Factor

The ratio of minimum specified ultimate strength of a material to its design stress at maximum rated capacity.

Suction Line

The hydraulic line connecting the pump inlet port to the reservoir or sump.

Super Torque

Designed exclusively for hydraulic lift duty to produce nearly three times the horsepower of conventional motors in the starting windings.

Surge

A transient rise of pressure or flow.

TEFC

Totally Enclosed, Fan-Cooled

TENV

Totally Enclosed Non-Ventilated

Tank

See Reservoir

Thrust Angle

A cross member of the scissor lift upon which the cylinder pushes to create travel.

Toe Guard

A beveled edge, on a platform, which serves as toe protection for personnel.

Torque

A rotary thrust. The turning effort of a fluid motor usually expressed in inch pounds.

Torque Tube

A cross member of a scissor lift that assists to structurally, equalize the loading through the legs of the lift.

Trained Personnel

Personnel who have been trained by a qualified person and have demonstrated the ability to perform a particular function on or around a scissor lift.

Transducer (or feedback transducer)

An element, which measures the results at the load and sends a signal back to the amplifier.

Travel

The vertical distance, which the platform moves from collapsed height to full raised height.

Trunnion

A cross member of a scissor lift which assists to structurally, equalize the loading through the legs of the lift. (Generally, the cylinders are attached to this tube).

Two-Way Valve

A directional control valve with two flow paths.

User

A person or entity that has care, control and custody of an industrial scissor lift.

A hydraulic component used primarily to physically limit the travel of scissor lifts which have RAM type cylinders by depressing a plunger which diverts hydraulic flow from the cylinder to the oil reservoir.

Velocity

The speed of flow through a hydraulic line, Expressed in feet per second (fps) or inches per second (ips).

Velocity Fuse

A hydraulic valve, which in the event of a severed hose or hydraulic failure will lock the oil in the cylinder and prevent the lift from falling.

Vertical Acting Gate

Gate which when opened will move vertically.

Vertical Creep

Unintended vertical movement of an industrial scissor lift.

Vertical Travel

The difference between the fully raised height of the platform deck and the fully closed height of the platform deck.

Viscosity

A measure of the internal friction or the resistance of a fluid to flow.

Volt

Voltage is the term used to indicate electrical potential.

Volume

The size of a space or chamber in cubic inches. Loosely applied to the output of a pump in gallons per minute (gpm).

Warning Light

Light used to signal movement of a certain device.

Wash-Down

Designed to allow the component to be washed down with water.

Water Proof

Device design to prevent water from entering part or component.

Watt

Power is the rate of doing work.

Work Access Lift

A stationary, portable or mobile scissor lift operated from the platform which may include rider(s) in addition to the operator; the lift may be used to transfer material from one elevation to another.

“Vee” Wheels

For use with inverted angle or Vee track to provide fixed path lateral movement.